Soonree Plasma Cutter LGK-40 wont make any Cutting Arc

[Mechatrommer]

this is only one time use of this china hung low plasma cutter. the first time its working then i put in storage. now i want to make a cutting, but it wont cut anymore. the unit turn on. relay to pass the compressed air is working, everything working except when i want to cut, nothing happened... i checked ground and nozzle cables all in good shape and continuity.. any hint which component is broken? and way to fix this? damned the hunglow design and parts..

[Psi]

Can you make it start by touching a small piece of wire between the tip and the grounded work piece to create the initial arc?
If so it isolates the problem to a fault with the HF starting arc

[Mechatrommer]

Can you make it start by touching a small piece of wire between the tip and the grounded work piece to create the initial arc?
If so it isolates the problem to a fault with the HF starting arc

do you mean try to form arc between workpiece and A?  (stock photo attached) my nozzle assembly start with nozzle handle, and then we put A into it, and then ceramic sleeve B and then C and then ceramic cover D... C is the one connected (touching) workpiece but not electrically connected to A due to B isolation... A is electrically connected down to nozzle handle to the cutter unit/body. if anything (by right), if we touch C to work piece, arc should be formed between C and A (there is very thin gap between them inside).. trying to play around with wire to arc with A is a bit tricky as A is enclosed in C with only a tiny hole at C. i have to dissasemble D, C and B, find a way to hold A to the nozzle handle and try to play arc with wire workpiece...

[Psi]

Not too sure, I only have a TIG not a plasma cutter, but I assume it also produces a high voltage pulse to start the arc.

[Mechatrommer]

if i'm going to probe nozzle tip with DSO for diagnosis at open circuit, what voltage should i expect? kVac?

[CapLeaker]

I dealt with that on an LGK-60 over at badcaps.
https://www.badcaps.net/forum/showthread.php?t=68275&highlight=plasma+cutter

[Mechatrommer]

I dealt with that on an LGK-60 over at badcaps.
https://www.badcaps.net/forum/showthread.php?t=68275&highlight=plasma+cutter

thanks, but i cannot register, so i cannot see pictures. the only hints i can get are broken resistors and adjusting spark gap.. if you can post pictures here that will be good.

[CapLeaker]

Let’s see if this works…

[CapLeaker]

Another pic…

[CapLeaker]

More pics again